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Diagnosis of mechanical vibrations in asynchronous motor origin
Dostál, Martin ; Dostál, Lukáš (referee) ; Janda, Marcel (advisor)
Every machine needs to be maintained and controlled, if may work reliably during they service life. Big part of service life of expensive machines are those machines in operation. Vibration diagnostics is type of analysis, that doesn’t need removal of rotation machinery. The vibration, that are created by running machinery, are used as source of information about mode of operation. This master’s thesis contains theoretical analysis of vibration diagnostics and vibration measurements of a particular machine. This thesis contains 3D models of bearings and rotor asynchronous machine, which are created by software Autodesk Inventor 2014. Bearings vibration analysis of this models is performed by software Ansys Workbench.
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Packet Analyser for UWB based on 15.4a standard
Leixner, Martin ; Šimek, Milan (referee) ; Mráz, Ľubomír (advisor)
The aim of this work is study the standard for wireless sensor networks IEEE 802.15.4a. Design and implementation of a packet analyzer for ultra wideband technology com- pliant with IEEE 802.15.4a standard. Integrate packet analyzer to inspection software Wireshark and implement dissector for view packets. Finally, analyze and evaluate the parameters of the proposed packet analyzer.
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Design of 10-channel audio equalizer with optimization of frequency characteristic and spectral audio analyzer
Štěrba, Václav ; Dvořák, Radek (referee) ; Šotner, Roman (advisor)
This work deals with the design of a 10-zones equalizer with optimized frequency characteristics with a spectrum audio analyzer. In this work the problem of processing audio signals using equalization for filtering the interference frequencies, correction of frequency cover signal boost or suppression of the required zones of the audible spectrum are also analyzed. The influence of subjective perception of sound intensity of the audio signals reproduction and its use in working with equalizer is discussed too. The work describes the principles and usage of the audio-analyzer as a tool for the optimization of the audio equalization setting when ensuring the appropriate listening conditions of music reproduction, spoken word, sounds, etc. It also focuses on the signal source for testing audio-chains, their generation and measurement using the audio analyzer. The equalizer equipment, audio-analyzer generator of reference signals equipment and power supply are designed as a single unit.
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Packet analyser for a Wireless Sensor Networks based on the standard IEEE 802.15.4
Bednařík, Martin ; Šimek, Milan (referee) ; Mráz, Ľubomír (advisor)
The objective of this thesis is to get familiar with wireless sensor networks technologies and with standard IEEE 802.15.4. and communication principle in wireless sensor networks built on this standard. Main goal of this project is to design a packet analyzer, which is capable to catch data on chosen channel and this data is able to analyze. Part of this project is production of necessary microcontroller software equipment. Another output of this project is do a research of available packet analyzers on market and compare them with analyzer build by this thesis.
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Control and Diagnostic System for I2C Bus
Juhás, Miloš ; Šebesta, Jiří (referee) ; Urbanec, Tomáš (advisor)
The objective of this diploma thesis is design and realization of I2C bus analyzer. I2C bus protocol is briefly described, together with means of connecting devices to the bus. Next the basic requirements for I2C bus analyzer are defined. Then the design of hardware I2C-to-USB converter including block description is proposed. The chapter dedicated to converter firmware describes method of communication with PC, decoding of intercepted commands and principles of master, slave and passive mode of bus monitoring. The last part is focused on operation software and its structure. Described are individual interfaces, most notable classes and default plugin modules.
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Analysis of LAN Network followed by Simulation in Opnet Modeler Environment
Skopal, Jakub ; Růčka, Lukáš (referee) ; Hošek, Jiří (advisor)
This thesis deals with the exploration of possibilities of LAN analysis with the use of the hardware analyzer Finisar TGHs from the Finisar Corporation Company. As a monitored network was choosed the local computer network in the laboratory PA-249 at the Department of Telecommunications, which is located at the Faculty of Electrical Engineering and Communication, Brno University of Technology. All results acquired from the complex long-term monitoring of the choosed LAN network are described in this thesis. Further, the thesis is focused on the simulation and analysis of the model of this network that was created in the simulation environment Opnet Modeler. The data obtained from the real LAN monitoring were used as a basis of an operating simulation of the transmission abilities and features of the real LAN network. The last part of the thesis describes the verification of the transmission capabilities and characteristics of the real LAN. Verification was performed in Opnet Modeler, where the network has been analyzed in detail.
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Wirelles netowrok monitor
Slováček, Miroslav ; Fiedler, Petr (referee) ; Bradáč, Zdeněk (advisor)
This master´s thesis deal with designing of the system for ZigBee wireless network monitoring. In the first, treoretical part, is reader introduced to this wireless standard. Acquired informations are possible to compare with the simillar wireless standards. Next part of this document describes procedure of designing harward part of modular system - motherboard and scanning module. In this place is so discussion about component parameters, which are very needed to keep. One part of this discussion is about the problems with wrong component parameters. The last part of this master´s thesis is about software part of this project and so shows designed system in work.
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The testing of celiac disease in connection with osteoporosis
SLADKÁ, Romana
My Bachelor´s thesis deals with the examination of celiac disease in connection to osteoporosis. The aim of the thesis was to specify the level of antidotes against tissue transglutaminase in the class IgA and IgG in the serum with osteoporosis diagnosed patients, to interpret, based on the results of the study, possible link between osteoporosis and celiac disease as well as to compare the outcome with scientific data. I focused on the present knowledge of osteoporosis and celiac disease in the first part. As for celiac disease, I described its history and characteristics. I also paid attention to diagnostics of celiac disease with the assistance of laboratory serological tests ELISA. I mentioned the free-gluten diet treatment after that. As regards osteoporosis, I described its history, symptoms, forms, perils and complications which the disease causes. I conducted the methodical part of my work in the biochemical haematological laboratory Stafila where I work, with its seat in České Budějovice. As for measurements, I took them in the department of microbiology, where immunologic tests are also taken. I carried out the screening of celiac disease from serum, namely the determination of antidotes against tissue transglutaminase in the class IgA and IgG, with the aid of ELISA - a sandwich method. I took measurements with 58 osteoporosis diagnosed patients. I obtained the sera thanks to the supervisor of my thesis Mrs. Marie Ládová, who is at the head of an osteological outpatient department in České Budějovice. I stated the serological markers of celiac disease with the assistance of enzymatic immunoanalysis conducted on automatic analyzer Nexgen Four, which was provided by the firm Test-Line. I describe the analyzer, its specification, checking and calibration of the gadget together with determination checks in this part of the thesis. Additionally, there is described the principle of the method ELISA- sandwich, which is non-competitive enzymatic immunoanalysis. At the end of the section there is depicted the methodical procedure of my work, the preparation of working solutions and checks, the preparation and dilution of samples for analysis and working procedure for semiquantitative interpretation with positivity index and for quantitative interpretation U/ml. I continued with my own measurements. while respecting standard operations procedures of the laboratory Stafila, a limited liability company. The results of my measurements are processed in the third part of the thesis. The acquired results are given in a table: quantitative interpretation of the antidote against tTg IgA and IgG (U/ml) level in the sera of the osteoporosis diagnosed patients. Then I presented a graph interpreting the proportional relation of the antidote against tTg IgA and IgG levels in the sera of the osteoporosis diagnosed patients. There are included calibration graphs for tissue transglutaminase IgA and IgG and tables of the obtained data of checks for the methods in the results. 3 out of the 58 examined samples of osteoporotic patients were positive, they had the level of antibodies higher than 22 U/ml. One of the samples had marginal figures, which means it had the antidotes against tTg IgA an IgG between 18 and 22 U/ml. Positive results were found with patients born in 1976 and 1978. A patient born in 1962 appeared to have a marginal result. The acquired antidote figures against tissue transglutaminase in the class IgA and IgG are presented proportionally in the graph 1. 3 out of the 58 measured samples were positive, which represents 5%, and 1 sample was marginal, which is 2%. My analysis is based on the availability of the examined material and the potential of our laboratory. Celiac disease is an illness which was not paid much attention to in the past. Hypothesis about the link between osteoporosis and celiac disease has been proved.
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Usage of packet wireless network analyzer Wireshark
SIROVÝ, Ladislav
This paper contains information about performing computer network analysis using Wireshark application and about wireless network security in general. This involves practical testing of various security models and measuring wireless security coverage in specific areas. The general overview of the most widely used open-source network analyzers and their comparsion is also included.
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